The film freezes and Harris tells viewers: “She should look him straight in the eye and tell him to stop, go away.”

At the time he made the 1985 video, the star had been abusing a friend of his daughter Bindi for eight years – starting when she was just 13.

In the 20 minute film Harris, who accused his own sex victims of lying, urges children who have been abused to speak out and ignore adults who do not believe them.

Asked by one child what to do if adults ignore them, he says: “That’s a really big question because sometimes grown-ups just don’t listen to kids.

“You know they don’t believe you, they say ‘rubbish, how could you tell such lies you wicked child? How dare you say something like that.’

“You have just got to keep trying and keep trying until someone believes you.

“Just because it’s hard you mustn’t give up. Keep trying, keep trying until just one person hears what you are saying and you feel safe again and remember just because the person who caused it gets into trouble it doesn’t mean it’s your fault.

"You are the one who felt hurt in the first place and you are the one who has a right to feel safe again. Okay?”

He adds: “If it’s hard to explain you can always take your doll and use that to explain or you could draw a picture and point on the picture where you were touched.

“You mustn’t be ashamed to tell people where you were touched. Sometime you can get a no feeling even from somebody you love within your own home.”

The film opens with Harris singing the theme tune “My body’s, nobody’s body but mine,” and ends with him joining two uniformed Met police officers and children for a sing along.

It features the entertainer talking to four primary school pupils about how to recognise abuse and speak out if they feel something is wrong.

In one dramatised sequence with striking similarities to Harris’ real life abuse, an eight-year-old girl called “Natasha” visits a friend’s house where the dad deliberately spills water on her and tells her to undress.

The film freezes and Harris tells viewers: “She should look him straight in the eye and tell him to stop, go away.”

In the video, Harris sits down with two girls and two boys, child actors aged seven and eight, in a London park under a tree. He tells them about “yes”feelings and “no” feelings, saying a “yes” feeling is like a cuddle from a baby brother: “You want it to go on for a long time. It feels good. It’s a yes feeling.”

But he adds: “Other touches give you a no feeling. It’s like, no, I don’t know why I don’t like that but I’m not too sure about that at all. I don’t want that to keep going. I want that to stop. That’s a no feeling. Sometimes a person can give you the no feeling without ever touching you at all.”

The film shows four dramatised scenes, during and after which Harris and the children discuss what is going on and offer advice.

The first is of a man offering to give a young girl money for a toy if she agrees to go home with him. Harris advises the girl she should refuse and say “go away very loudly”.

Harris says: “It’s possible to say no to people making you feel that way. Some people, especially grown-ups, they don’t listen. They don’t pay any attention to you. Come out and say ‘no please stop’”.

He says: “Remember if they want you to keep a bad secret its a secret that could hurt other children so you should tell your parents or tell and adult you trust like your teacher or school nurse.

“The best way to be safe is to tell enough other people. You want to blow a whistle and everyone can hear.”

A final scene shows “Sophie” aged around seven and her father who invites her for a bubble bath that will be their “secret”.

He tells the girl: “I don’t want you to tell mummy or anyone. If you do, I could go to prison and that would be all your fault.”

Harris adds: “Some people don’t act right with kids and they need help. You can’t protect them from trouble that they have caused but to say something so that you and the family can get the help you need. You know nothing gets better by keeping quiet about it.”

They sing: “My feelings are my feelings and my feelings are real. Sometimes it’s hard to say no and be strong. My body’s mine from my head to my toe, please leave me alone when you hear me say no. My body is mine to use as I chose.”